string = "他问,你知道cba是什么单词的缩写么 ? "

print(string)

print('1.删除空格')

print('2.英文标点替换')

print('3.首字母大写')

print('4.退出')

while True:

    option = input("请输入功能选项：\n")
    if option=='1':
        string = string.replace(' ','')
        print(string)
    elif option =='2':
        # 替换英文标点
        for i in string:
            if i == ',':
                string = string.replace(',', '，')
            elif i == '.':
                string = string.replace('.', '。')
            elif i == '?':
                string = string.replace('?', '？')
            elif i == '?':
                string = string.replace("' ", "’")
            string = string
        print(string)
    elif option =='3':
        # 首字母大写
            string = string.upper()
            print(string)
    elif option == '4':
        break